burofax.onmax.me sends a letter the user has written or approved from a sender address in Spain to a recipient address in Spain, as a Correos burofax (acuse de recibo + copia certificada) or as a Notificados certified notification (a trusted third party, not Correos). It is a sending service, not a law firm: never present the text as legal advice and never claim legal validity is guaranteed.
Both postal addresses must be real addresses in Spain, whatever the user's nationality or where they are now; a sender or recipient abroad can't be served, so say so before drafting. Never suggest making up an address or reformatting a foreign one to look Spanish. Typical flow: quote_burofax if the user asks about price; check_spanish_address for the sender and the recipient; show the full letter text to the user and get explicit approval; then create_burofax_draft and show the review link. Nothing is sent or charged until the user pays on that page. Never ask for DNI/NIE/NIF or any government ID in the chat. The letter is always in Spanish (or bilingual), because the recipient is in Spain. Preserve the exact approved letter body without adding legal claims. Show the private review URL after draft creation and explain that sending requires payment there. Distinguish Correos burofax from Notificados certified notification in prices and results. Never ask for or include DNI/NIE/NIF or other government IDs in chat.
Discoverability
0/6 passed0 of 6 passed0/100
Client listings and public setup information.
mcp.json or server-card.json
Either mcp.json or an MCP Server Card declaring this endpoint passes.
No matching mcp.json manifest or MCP Server Card was found at the checked URLs.
How to fix: For ChatGPT submission, set one exact HTTPS origin such as "https://app.example.com" on every view via _meta.ui.domain (or openai/widgetDomain). Paths are not valid and all views in one app must share the origin.
How to fix: For tools that render a UI resource, add openai/toolInvocation with string fields invoking and invoked (present-tense labels shown while the tool runs and after it finishes, e.g. "Searching…" / "Searched").
How to fix: Use a ui:// URI and text/html;profile=mcp-app. For mcp-use v1, use widgetMetadata.metadata.widgetDescription; for v2, use the bound tool's view.description. The current description check reads _meta.ui.widgetDescription or _meta["openai/widgetDescription"] on resource contents or linked tools, not resource.description. Consequently, v2 view.description alone may leave this warning: report the checker compatibility gap instead of adding unsupported v1 fields or claiming the warning is fixed.
The title clearly communicates the tool’s action and subject. Keep it concise.
Description95/100
Returns all-in EUR prices and inclusions for two delivery options between postal addresses in Spain (sender and recipient): a Correos burofax with acuse de recibo and copia certificada, and a certified notification by Notificados, a trusted third party distinct from Correos. Pricing uses the supplied page count, a character-count estimate, or one page by default. No draft, reservation or delivery is created.
The description explains the capability, when to use it, and what to expect.
Inputs92/100
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
option
Option the user asked about, if any. Both options are always returned.
Clear enough to supply this argument.
pages
Number of A4 pages, 1–10, if already known.
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
text_length
Length of the letter body in characters, to estimate pages when the page count is unknown.
No output schema is declared. Add one for structured results so clients can interpret returned fields.
Not declared
Original tool metadata
{
"name": "quote_burofax",
"title": "Quote a burofax",
"description": "Returns all-in EUR prices and inclusions for two delivery options between postal addresses in Spain (sender and recipient): a Correos burofax with acuse de recibo and copia certificada, and a certified notification by Notificados, a trusted third party distinct from Correos. Pricing uses the supplied page count, a character-count estimate, or one page by default. No draft, reservation or delivery is created.",
"inputSchema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"pages": {
"type": "integer",
"maximum": 10,
"minimum": 1,
"description": "Number of A4 pages, 1–10, if already known."
},
"option": {
"enum": [
"correos",
"notificados"
],
"type": "string",
"description": "Option the user asked about, if any. Both options are always returned."
},
"text_length": {
"type": "integer",
"maximum": 100000,
"minimum": 0,
"description": "Length of the letter body in characters, to estimate pages when the page count is unknown."
}
}
},
"annotations": {
"title": "Quote a burofax",
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}
}
The title clearly communicates the tool’s action and subject. Keep it concise.
Description90/100
Checks the required fields of a Spanish postal address offline, the five-digit postcode range and the province indicated by the postcode. Returns normalised fields and a list of problems. Street existence and recipient identity are not verified. Addresses outside Spain are reported as a problem, because both the sender and the recipient must be in Spain.
Describe the returned information so the agent knows whether it will answer the request.
Inputs88/100
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
name
Recipient's full name or company name.
Clear enough to supply this argument.
street
Street, number, floor and door.
Clear enough to supply this argument.
postal_code
Código postal, 5 digits.
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
city
Town or city.
Clear enough to supply this argument.
province
Province, if the user gave one.
Explain what happens when this optional value is omitted.
country
Country, if the user gave one. Anything other than Spain is reported as a problem.
Clear enough to supply this argument.
Annotations100/100
All four behavior hints are declared.
{
"title": "Check a Spanish postal address",
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}
Output schema0/100
No output schema is declared. Add one for structured results so clients can interpret returned fields.
Not declared
Original tool metadata
{
"name": "check_spanish_address",
"title": "Check a Spanish postal address",
"description": "Checks the required fields of a Spanish postal address offline, the five-digit postcode range and the province indicated by the postcode. Returns normalised fields and a list of problems. Street existence and recipient identity are not verified. Addresses outside Spain are reported as a problem, because both the sender and the recipient must be in Spain.",
"inputSchema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"city": {
"type": "string",
"maxLength": 120,
"description": "Town or city."
},
"name": {
"type": "string",
"maxLength": 200,
"description": "Recipient's full name or company name."
},
"street": {
"type": "string",
"maxLength": 300,
"description": "Street, number, floor and door."
},
"country": {
"type": "string",
"maxLength": 60,
"description": "Country, if the user gave one. Anything other than Spain is reported as a problem."
},
"province": {
"type": "string",
"maxLength": 80,
"description": "Province, if the user gave one."
},
"postal_code": {
"type": "string",
"maxLength": 20,
"description": "Código postal, 5 digits."
}
}
},
"annotations": {
"title": "Check a Spanish postal address",
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}
}
The title clearly communicates the tool’s action and subject. Keep it concise.
Description96/100
Renders supplied, user-approved letter text and postal addresses as an A4 PDF draft in Spanish or bilingual text. Both the sender and the recipient address must be in Spain; others are rejected before anything is stored. Returns the page count, the price of each delivery option and a private review URL. No letter is sent and no charge is made. Payment takes place separately on the review page. Government identification numbers are outside the supported inputs.
The description explains the capability, when to use it, and what to expect.
Inputs82/100
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
sender › name
Full name of the person or company, as it should appear on the letter.
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
sender › street
Street, number, floor and door, e.g. "Calle Mayor 12, 3º B".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
sender › postal_code
Spanish 5-digit postcode (código postal), e.g. "28013".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
sender › city
Town or city (localidad), e.g. "Madrid".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
sender › province
Province, optional. Checked against the postcode when given.
Explain what happens when this optional value is omitted.
sender › country
Omit it, or "España". Only addresses in Spain are accepted; any other country is rejected.
Clear enough to supply this argument.
sender › email
Sender's email for the receipt and tracking, optional. Not printed on the letter.
Clear enough to supply this argument.
recipient › name
Full name of the person or company, as it should appear on the letter.
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
recipient › street
Street, number, floor and door, e.g. "Calle Mayor 12, 3º B".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
recipient › postal_code
Spanish 5-digit postcode (código postal), e.g. "28013".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
recipient › city
Town or city (localidad), e.g. "Madrid".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
recipient › province
Province, optional. Checked against the postcode when given.
Explain what happens when this optional value is omitted.
recipient › country
Omit it, or "España". Only addresses in Spain are accepted; any other country is rejected.
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
subject
Short subject line, in Spanish, printed as "Asunto: …", e.g. "Reclamación de la fianza del contrato de alquiler".
Remove validation rules already expressed in this field’s schema; describe its meaning and usage instead.
body
The full letter body exactly as the user approved it, in Spanish (or bilingual). Separate paragraphs with a blank line. No address blocks, date or signature: those are added automatically.
Clear enough to supply this argument.
option
Delivery option: "correos" (Burofax de Correos) or "notificados" (certified notification by a trusted third party, not Correos). Use the user's choice; if they have none, use "correos". They can switch on the review page.
Clear enough to supply this argument.
city
City for the dateline "En <city>, a <date>". Defaults to the sender's city.
Clear enough to supply this argument.
Annotations100/100
All four behavior hints are declared.
{
"title": "Create a burofax draft for review",
"readOnlyHint": false,
"openWorldHint": false,
"idempotentHint": false,
"destructiveHint": false
}
Output schema0/100
No output schema is declared. Add one for structured results so clients can interpret returned fields.
Not declared
Original tool metadata
{
"name": "create_burofax_draft",
"title": "Create a burofax draft for review",
"description": "Renders supplied, user-approved letter text and postal addresses as an A4 PDF draft in Spanish or bilingual text. Both the sender and the recipient address must be in Spain; others are rejected before anything is stored. Returns the page count, the price of each delivery option and a private review URL. No letter is sent and no charge is made. Payment takes place separately on the review page. Government identification numbers are outside the supported inputs.",
"inputSchema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"sender",
"recipient",
"subject",
"body"
],
"properties": {
"body": {
"type": "string",
"maxLength": 40000,
"minLength": 1,
"description": "The full letter body exactly as the user approved it, in Spanish (or bilingual). Separate paragraphs with a blank line. No address blocks, date or signature: those are added automatically."
},
"city": {
"type": "string",
"maxLength": 80,
"description": "City for the dateline \"En <city>, a <date>\". Defaults to the sender's city."
},
"option": {
"enum": [
"correos",
"notificados"
],
"type": "string",
"default": "correos",
"description": "Delivery option: \"correos\" (Burofax de Correos) or \"notificados\" (certified notification by a trusted third party, not Correos). Use the user's choice; if they have none, use \"correos\". They can switch on the review page."
},
"sender": {
"type": "object",
"required": [
"name",
"street",
"postal_code",
"city"
],
"properties": {
"city": {
"type": "string",
"maxLength": 80,
"description": "Town or city (localidad), e.g. \"Madrid\"."
},
"name": {
"type": "string",
"maxLength": 120,
"description": "Full name of the person or company, as it should appear on the letter."
},
"email": {
"type": "string",
"maxLength": 254,
"description": "Sender's email for the receipt and tracking, optional. Not printed on the letter."
},
"street": {
"type": "string",
"maxLength": 160,
"description": "Street, number, floor and door, e.g. \"Calle Mayor 12, 3º B\"."
},
"country": {
"type": "string",
"maxLength": 60,
"description": "Omit it, or \"España\". Only addresses in Spain are accepted; any other country is rejected."
},
"province": {
"type": "string",
"maxLength": 60,
"description": "Province, optional. Checked against the postcode when given."
},
"postal_code": {
"type": "string",
"maxLength": 10,
"description": "Spanish 5-digit postcode (código postal), e.g. \"28013\"."
}
},
"description": "Who sends the letter. Must be a postal address in Spain (the acuse de recibo goes back there). Printed top left and on the signature line."
},
"subject": {
"type": "string",
"maxLength": 200,
"minLength": 1,
"description": "Short subject line, in Spanish, printed as \"Asunto: …\", e.g. \"Reclamación de la fianza del contrato de alquiler\"."
},
"recipient": {
"type": "object",
"required": [
"name",
"street",
"postal_code",
"city"
],
"properties": {
"city": {
"type": "string",
"maxLength": 80,
"description": "Town or city (localidad), e.g. \"Madrid\"."
},
"name": {
"type": "string",
"maxLength": 120,
"description": "Full name of the person or company, as it should appear on the letter."
},
"street": {
"type": "string",
"maxLength": 160,
"description": "Street, number, floor and door, e.g. \"Calle Mayor 12, 3º B\"."
},
"country": {
"type": "string",
"maxLength": 60,
"description": "Omit it, or \"España\". Only addresses in Spain are accepted; any other country is rejected."
},
"province": {
"type": "string",
"maxLength": 60,
"description": "Province, optional. Checked against the postcode when given."
},
"postal_code": {
"type": "string",
"maxLength": 10,
"description": "Spanish 5-digit postcode (código postal), e.g. \"28013\"."
}
},
"description": "Who receives it. Must be a postal address in Spain."
}
}
},
"annotations": {
"title": "Create a burofax draft for review",
"readOnlyHint": false,
"openWorldHint": false,
"idempotentHint": false,
"destructiveHint": false
}
}
The title clearly communicates the tool’s action and subject. Keep it concise.
Description98/100
Returns the recorded status, dated timeline and available status or certificate links for an order reference, draft reference or review/status URL. Events can include draft creation, payment, operator acceptance, delivery and certificate availability. This read-only operation does not create or change a letter.
The description explains the capability, when to use it, and what to expect.
Inputs93/100
Input documentation gives an agent enough context to populate the arguments.
reference
Order reference (BFX-…) or draft reference, or the full review/status link.
No output schema is declared. Add one for structured results so clients can interpret returned fields.
Not declared
Original tool metadata
{
"name": "get_burofax_status",
"title": "Get burofax status",
"description": "Returns the recorded status, dated timeline and available status or certificate links for an order reference, draft reference or review/status URL. Events can include draft creation, payment, operator acceptance, delivery and certificate availability. This read-only operation does not create or change a letter.",
"inputSchema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"reference"
],
"properties": {
"reference": {
"type": "string",
"maxLength": 200,
"minLength": 6,
"description": "Order reference (BFX-…) or draft reference, or the full review/status link."
}
}
},
"annotations": {
"title": "Get burofax status",
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}
}
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Put your MCP to the test
A few tasks worth trying with this server, chosen from its reviewed tools. These have not been run.
01Check a Spanish postal addressChecks the required fields of a Spanish postal address offline, the five-digit postcode range and the province indicated by the postcode.
02Quote a burofaxReturns all-in EUR prices and inclusions for two delivery options between postal addresses in Spain (sender and recipient): a Correos burofax with acuse de r…
03Get burofax statusReturns the recorded status, dated timeline and available status or certificate links for an order reference, draft reference or review/status URL.
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Remite setup, tools, quality score, publishing readiness, and alternatives.
How do I add Remite to Claude, ChatGPT, or Cursor?
Add Remite to Claude, ChatGPT, or Cursor by connecting its remote MCP URL in each client's MCP settings. In Claude, add a custom connector. In ChatGPT, add an MCP app. In Cursor, add an MCP server under Settings. The MCP URL is https://burofax.onmax.me/mcp/claude.
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How clear is Remite's MCP tool documentation?
As of November 10, 2026, Remite scores 85/100 in Manufact's review of tool titles, descriptions, input and output schemas, and behavior annotations. The review covers 4 of 4 discovered tools. The quality score measures documentation clarity; runtime behavior and marketplace readiness require separate checks.
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As of November 10, 2026, alternatives to Remite in communication on the Manufact MCP leaderboard include Granola, Cooper Email, Dial, Primitive Email, and Salvy.
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